Mongolians were singing songs to their dead in the streets of their capital, Hanoi, on Dec. 13.

Thousands of other people had gathered for a mass funeral.

Then, the war started again.

Thousands more people turned out to mourn the fallen.

It was one of the biggest public events in Vietnam history.

But in recent months, the song is getting old.

Migrants sing songs in front of a Chinese flag during a rally in Vietnam, Thursday, Jan. 5, 2020.